Taxon- and senescence-specific fluorescence of colored leaves from the Pliocene Willershausen Lagerstätte, Germany

Taxon- and senescence-specific fluorescence of colored leaves from the Pliocene Willershausen Lagerstätte, Germany
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德国上新世 Willershausen Lagerstätte 彩色叶子的分类和衰老特异性荧光

DOI:
10.1007/s12542-020-00538-3
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发表时间:
2021
期刊:
影响因子:
1.8
通讯作者:
Wolkenstein
Wolkenstein
中科院分区:
地球科学4区
文献类型:
--
作者:
Wolkenstein

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紫外光诱导荧光广泛用于煤显微组分和孢粉样品的研究,但迄今为止尚未对植物大型化石进行详细描述。在这里,我们报告了来自德国下萨克森州威勒斯豪森上新世的各种化石被子植物叶类群的明亮紫外线诱导荧光的特征。荧光是特殊的,因为可以观察到从绿色到黄色到红色的不同荧光颜色,并且发现荧光特性与属相关。使用共焦激光扫描显微镜,详细研究了荧光并获得了发射光谱,可以区分广泛的荧光团。叶绿素降解产物产生的荧光发射表明,荧光可以用作叶子化石特殊化学保存的指示剂。与现今衰老植物的比较表明,化石叶子的荧光差异主要是由衰老过程中有机化合物的分类特异性退化引起的。在相同的石化条件下保存的具有不同荧光特性的各种叶子类群的出现表明,成岩作用对于叶子荧光的差异并不重要。
UV-light-induced fluorescence is widely used in the study of coal macerals and palynological samples, but to date has not been described in great detail for plant macrofossils. Here, we report the characteristics of bright UV-light-induced fluorescence of various fossil angiosperm leaf taxa from the Upper Pliocene of Willershausen, Lower Saxony, Germany. The fluorescence is exceptional, since different fluorescence colors ranging from green to yellow to red can be observed and fluorescence properties are found to be related to genera. Using confocal laser scanning microscopy, fluorescence was studied in detail and emission spectra were obtained that allowed to differentiate broad groups of fluorophores. Fluorescence emissions attributed to chlorophyll degradation products demonstrate that fluorescence can be used as an indicator for exceptional chemical preservation of leaf fossils. Comparison with present-day senescing plants suggests that the fluorescence differences in the fossil leaves are mainly caused by taxon-specific degeneration of organic compounds during senescence. The occurrence of various leaf taxa with different fluorescence properties, preserved under identical conditions of fossilization, indicate that diagenesis was not crucial for the differences in leaf fluorescence.
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发表时间: 1967
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DOI: --
发表时间: 1967
期刊:
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